Waltham weather in September (Massachusetts, United States of America)

What does the weather outlook for Waltham look like in September? Thinking about a visit? Explore this page for a full overview of the weather conditions this month.

Temperatures

Experience perfect weather in Waltham in September, characterized by high temperatures and moderate rainfall. In the daytime, temperatures tend to hover near 24°C, cooling down at night to around 12°C.

Precipitation

Waltham in September usually receives moderate rainfall, averaging around 83 mm for the month. Experience the driest month of the year, where clear skies and little rain are the norms. It's a great time to be outdoors. Rain is expected on roughly 9 days.

Average sunshine

With approximately 238 hours hours of sun, the days are filled with brightness. It makes it a perfect month for outdoor activities.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit. May, August and September generally stand out with the best circumstances. While January, February, March and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Waltham climate page with graphs.

 

Waltham, monthly averages in September

Min Temperature 12°C  

Max Temperature 24°C  

Water Temperature 18°C *  

Chance of Rain 30%  

Precipitation 83 mm  

Rainy days 9 days  

Humidity 69% *  

Windspeed 18 km/h *  

Sunshine 238 hours *  

Percentage Sunshine 63% *  

* Data from: Boston, the United States of America (16 KM, 10 Miles).

Where to go in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to Waltham, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes. With a water temperature of around 18°C there is no need to bring your swimwear.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

Outdoor sports

9/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Waltham.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.